The president of the Concacaf grouping of American football associations and a Fifa executive committee member since 1983, Warner's statement directly targeted Sepp Blatter, Fifa's president, and Jérôme Valcke, the world governing body's secretary-general.

His allegations attacked the personal integrity of Blatter and Valcke, and included the explosive revelation that Valcke had accused Qatar of having "bought" the hosting of the 2022 World Cup. Warner's accusation that Blatter handed $1m (£610,000) to Concacaf this month raises huge questions over the legitimacy of Fifa's processes, particularly how the money for the organisation's flagship Goal development projects is handed out.

In detail, the Warner allegations are:

1) That Valcke accused Qatar of having "bought" the World Cup

This rips open again the rumbling controversy over how Qatar, the tiny oil- and gas-rich Gulf state, won the right to host the 2022 tournament. It was contained in an email Valcke sent to Warner in which he was dismissive of Bin Hammam's candidacy for Fifa president against Blatter, to whom Valcke is a loyalist. In the email Valcke wondered witheringly of Bin Hammam whether the Qatari felt, by standing against Blatter, he could "buy Fifa as they [Qatar] bought the WC".

Valcke has confirmed the email is genuine. It is clear that at the very top of Fifa, the suspicion lurks that Qatar behaved improperly, paying money to secure enough executive committee member votes for a winning bid in December.

After Qatar were awarded the tournament, allegations followed of vote-sharing with Spain, which is not allowed in the Fifa rules. Then the House of Commons culture, media and sport select committee published evidence from the Sunday Times quoting a Qatar whistleblower saying two African Fifa executive committee members, Issa Hayatou and Jacques Anouma, had been paid bribes to vote for Qatar.

Both men denied that, and the Qatar bid team issued a detailed rejection. On Sunday Valcke told a press conference the whistleblower could not be contacted and there was "no reason" to further investigate how Qatar won the bid.

Warner's publication of this email demands an answer from Valcke, which has not been forthcoming so far, as to why he said Qatar "bought" the World Cup. Qatar's 2022 bid team released a statement saying they "categorically deny any wrongdoing in connection with their winning bid."

2) That Blatter made a cash gift of $1m to Concacaf "to spend as it deems fit"

Warner said Blatter gave this money to Concacaf at its annual congress in Miami on 3 May. One president of a Concacaf association has confirmed that the gift was made, which was reinforced by Michel Platini, Uefa's president, on Monday. The money is said to have been for two projects under Fifa's flagship Goal development initiative, which spreads the governing body's huge income, $1.3bn last year, around the world.

Doubts have long been expressed about how the Goal money is distributed, including accusations that the process is not accountable enough, and can too often be paid out as largesse to member associations, to cement Fifa's regime in Zurich.

Warner said Platini, a Fifa executive committee member, was "annoyed" about Blatter's $1m gift, and had complained to Valcke that: "Mr Blatter had no permission from the finance committee to make this gift." Warner said Valcke replied that he would "find the money for Mr Blatter".

Platini, also considered a Blatter loyalist, has denied that he was annoyed, but his answer in itself called into question the administration of the Goal money. Platini revealed that Blatter "has his own budget" from Goal. The Uefa president said: "He [Blatter] can give many projects to many national associations."

That statement, that Blatter can hand out Goal money as he wishes, with the executive committee approving it afterwards, raises huge doubts over Fifa's procedures. Warner is suggesting that the president, a month before he was standing for re-election, handed out $1m for development to a confederation, in effect, Warner alleges, as a cash gift in return for votes. That was the offence of which Bin Hammam and Warner have been accused, and for which they were suspended pending a full investigation.

3) That Blatter gave computers and laptops to 13 Caribbean football associations

This is a straightforward accusation that Blatter dished out gifts, by implication in return for presidential votes. Blatter has called a press conference for 5pm on Monday at Fifa's Zurich headquarters, at which he – and Valcke – are expected to give their responses to Warner's allegations.

Warner raged in his statement that the charges against him and Bin Hammam, which led to their suspension on Sunday, were "politically motivated" to secure Blatter's re-election, and he concluded with a dark threat: "I intend to say a lot more on this matter shortly."

Fifa is bracing itself for further revelations from the inside. Warner has been at the heart of Fifa, on the executive committee, for 28 years, working closely with Blatter.

Fifa stands on the brink of disintegration today as Sepp Blatter and Jérôme Valcke, its two most senior figures, were accused of a "politically motivated" subversion of the presidential-election process